This is an odd one gibbo.
No, that's a different one I didn't know about.
The Sydney Morning Herald - Tuesday 8 September 1987 p.31
DEATHS
STORRIER, Barbara Ellen, September 7, 1987, at Bathurst Nursing Home, Kelso, beloved mother and mother-in-law of Michael and Catherine, loved grandmother of Tony, Andrew, Chris, Greg, Beverley and Sandra, loved great-grandmother of Nathan, aged 73 years. In God's care.
It's possible Barbara was born in Qld. in 1915 or 1916 just after the close of current index. Also possible LEANE is not her maiden name. If she married in NSW then it was after close of current index 1963 which would be odd because Leslie died in 1964.
If she is the mother not step-mother of Michael then ... Perhaps they didn't marry. To be a great-grandmother or a great grand step-mother then Michael was born abt ???
Leslie's first wife died 28 Dec 1951 but she was not listed in E/R as living with Leslie apart from 1913. Not 1930 onwards. No sign of a divorce probably no divorce because both were buried as RC.